text: /* $Id: tstFileAppendWin-1.cpp $ */
  /** @file
   * IPRT Testcase - Exploration of File Appending on Windows.
   */
  
  /*
   * Copyright (C) 2008-2015 Oracle Corporation
   *
   * This file is part of VirtualBox Open Source Edition (OSE), as
   * available from http://www.virtualbox.org. This file is free software;
   * you can redistribute it and/or modify it under the terms of the GNU
   * General Public License (GPL) as published by the Free Software
   * Foundation, in version 2 as it comes in the "COPYING" file of the
   * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
   * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
   *
   * The contents of this file may alternatively be used under the terms
   * of the Common Development and Distribution License Version 1.0
   * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
   * VirtualBox OSE distribution, in which case the provisions of the
   * CDDL are applicable instead of those of the GPL.
   *
   * You may elect to license modified versions of this file under the
   * terms and conditions of either the GPL or the CDDL or both.
   */
  
  
  /*******************************************************************************
  *   Header Files                                                               *
  *******************************************************************************/
  #include <Windows.h>
  #include <stdio.h>
  #include <string.h>
  #include <stdarg.h>
  
  
  /*******************************************************************************
  *   Global Variables                                                           *
  *******************************************************************************/
  static int g_cErrors = 0;
  
  
  static int MyFailure(const char *pszFormat, ...)
  {
      va_list va;
  
      printf("tstFileAppendWin-1: FATAL: ");
      va_start(va, pszFormat);
      vprintf(pszFormat, va);
      va_end(va);
      g_cErrors++;
      return 1;
  }
  
  
  void MyError(const char *pszFormat, ...)
  {
      va_list va;
  
      printf("tstFileAppendWin-1: ERROR: ");
      va_start(va, pszFormat);
      vprintf(pszFormat, va);
      va_end(va);
      g_cErrors++;
  }
  
  
  int main()
  {
      HANDLE hFile;
      LARGE_INTEGER off;
      DWORD cb;
      char szBuf[256];
  
  
      printf("tstFileAppendWin-1: TESTING...\n");
  
      /*
       * Open it write only and do some appending.
       * Checking that read fails and that the file position changes after the read.
       */
      DeleteFile("tstFileAppendWin-1.tst");
      hFile = CreateFile("tstFileAppendWin-1.tst",
                         (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA),
                         FILE_SHARE_READ,
                         NULL,
                         CREATE_ALWAYS,
                         FILE_ATTRIBUTE_NORMAL,
                         NULL);
      if (hFile == INVALID_HANDLE_VALUE)
          return MyFailure("1st CreateFile: %d\n", GetLastError());
  
      off.QuadPart = 0;
      if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
          MyError("1st SetFilePointerEx failed: %d\n", GetLastError());
      else if (off.QuadPart != 0)
          MyError("unexpected position on open: %ld - expected 0\n", (long)off.QuadPart);
  
      if (!WriteFile(hFile, "0123456789", 10, &cb, NULL))
          MyError("write fail: %d\n", GetLastError());
  
      off.QuadPart = 0;
      if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
          MyError("2nd SetFilePointerEx failed: %d\n", GetLastError());
      else if (off.QuadPart != 10)
          MyError("unexpected position on write: %ld - expected 10\n", (long)off.QuadPart);
      else
          printf("tstFileAppendWin-1: off=%ld after first write\n", (long)off.QuadPart);
  
      SetLastError(0);
      if (ReadFile(hFile, szBuf, 1, &cb, NULL))
          MyError("read didn't fail! cb=%#lx lasterr=%d\n", (long)cb, GetLastError());
  
      off.QuadPart = 5;
      if (!SetFilePointerEx(hFile, off, &off, FILE_BEGIN))
          MyError("3rd SetFilePointerEx failed: %d\n", GetLastError());
      else if (off.QuadPart != 5)
          MyError("unexpected position after set file pointer: %ld - expected 5\n", (long)off.QuadPart);
  
      CloseHandle(hFile);
  
      /*
       * Open it write only and do some more appending.
       * Checking the initial position and that it changes after the write.
       */
      hFile = CreateFile("tstFileAppendWin-1.tst",
                         (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA),
                         FILE_SHARE_READ,
                         NULL,
                         OPEN_EXISTING,
                         FILE_ATTRIBUTE_NORMAL,
                         NULL);
      if (hFile == INVALID_HANDLE_VALUE)
          return MyFailure("2nd CreateFile: %d\n", GetLastError());
  
      off.QuadPart = 0;
      if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
          MyError("4th SetFilePointerEx failed: %d\n", GetLastError());
      else if (off.QuadPart != 0)
          MyError("unexpected position on open: %ld - expected 0\n", (long)off.QuadPart);
      else
          printf("tstFileAppendWin-1: off=%ld on 2nd open\n", (long)off.QuadPart);
  
      if (!WriteFile(hFile, "abcdefghij", 10, &cb, NULL))
          MyError("2nd write failed: %d\n", GetLastError());
  
      off.QuadPart = 0;
      if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
          MyError("5th SetFilePointerEx failed: %d\n", GetLastError());
      else if (off.QuadPart != 20)
          MyError("unexpected position on 2nd write: %ld - expected 20\n", (long)off.QuadPart);
      else
          printf("tstFileAppendWin-1: off=%ld after 2nd write\n", (long)off.QuadPart);
  
      CloseHandle(hFile);
  
      /*
       * Open it read/write.
       * Check the initial position and read stuff. Then append some more and
       * check the new position and see that read returns 0/EOF. Finally,
       * do some seeking and read from a new position.
       */
      hFile = CreateFile("tstFileAppendWin-1.tst",
                         (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA) | GENERIC_READ,
                         FILE_SHARE_READ,
                         NULL,
                         OPEN_EXISTING,
                         FILE_ATTRIBUTE_NORMAL,
                         NULL);
      if (hFile == INVALID_HANDLE_VALUE)
          return MyFailure("3rd CreateFile: %d\n", GetLastError());
  
      off.QuadPart = 0;
      if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
          MyError("6th SetFilePointerEx failed: %d\n", GetLastError());
      else if (off.QuadPart != 0)
          MyError("unexpected position on open: %ld - expected 0\n", (long)off.QuadPart);
      else
          printf("tstFileAppendWin-1: off=%ld on 3rd open\n", (long)off.QuadPart);
  
      if (!ReadFile(hFile, szBuf, 10, &cb, NULL) || cb != 10)
          MyError("1st ReadFile failed: %d\n", GetLastError());
      else if (memcmp(szBuf, "0123456789", 10))
          MyError("read the wrong stuff: %.10s - expected 0123456789\n", szBuf);
  
      off.QuadPart = 0;
      if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
          MyError("7th SetFilePointerEx failed: %d\n", GetLastError());
      else if (off.QuadPart != 10)
          MyError("unexpected position on 1st read: %ld - expected 0\n", (long)off.QuadPart);
      else
          printf("tstFileAppendWin-1: off=%ld on 1st read\n", (long)off.QuadPart);
  
      if (!WriteFile(hFile, "klmnopqrst", 10, &cb, NULL))
          MyError("3rd write failed: %d\n", GetLastError());
  
      off.QuadPart = 0;
      if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
          MyError("8th SetFilePointerEx failed: %d\n", GetLastError());
      else if (off.QuadPart != 30)
          MyError("unexpected position on 3rd write: %ld - expected 30\n", (long)off.QuadPart);
      else
          printf("tstFileAppendWin-1: off=%ld after 3rd write\n", (long)off.QuadPart);
  
      SetLastError(0);
      if (ReadFile(hFile, szBuf, 1, &cb, NULL) && cb != 0)
          MyError("read after write didn't fail! cb=%#lx lasterr=%d\n", (long)cb, GetLastError());
  
      off.QuadPart = 15;
      if (!SetFilePointerEx(hFile, off, &off, FILE_BEGIN))
          MyError("9th SetFilePointerEx failed: %d\n", GetLastError());
      else if (off.QuadPart != 15)
          MyError("unexpected position on 3rd write: %ld - expected 15\n", (long)off.QuadPart);
      else
      {
          if (!ReadFile(hFile, szBuf, 10, &cb, NULL) || cb != 10)
              MyError("1st ReadFile failed: %d\n", GetLastError());
          else if (memcmp(szBuf, "fghijklmno", 10))
              MyError("read the wrong stuff: %.10s - expected fghijklmno\n", szBuf);
  
          off.QuadPart = 0;
          if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
              MyError("10th SetFilePointerEx failed: %d\n", GetLastError());
          else if (off.QuadPart != 25)
              MyError("unexpected position on 2nd read: %ld - expected 25\n", (long)off.QuadPart);
          else
              printf("tstFileAppendWin-1: off=%ld after 2nd read\n", (long)off.QuadPart);
      }
  
      CloseHandle(hFile);
  
      /*
       * Open it read only + append and check that we cannot write to it.
       */
      hFile = CreateFile("tstFileAppendWin-1.tst",
                         FILE_APPEND_DATA | GENERIC_READ,
                         FILE_SHARE_READ,
                         NULL,
                         CREATE_ALWAYS,
                         FILE_ATTRIBUTE_NORMAL,
                         NULL);
      if (hFile == INVALID_HANDLE_VALUE)
          return MyFailure("4th CreateFile: %d\n", GetLastError());
  
      SetLastError(0);
      if (WriteFile(hFile, "pqrstuvwx", 10, &cb, NULL))
          MyError("write didn't on read-only+append open: %d cb=%#lx\n", GetLastError(), (long)cb);
  
      CloseHandle(hFile);
      DeleteFile("tstfileAppendWin-1.tst");
  
      if (g_cErrors)
          printf("tstFileAppendWin-1: FAILED\n");
      else
          printf("tstFileAppendWin-1: SUCCESS\n");
      return g_cErrors ? 1 : 0;
  }
  
  